Serum lipids as predictive markers for death by suicide

Area of Science:

• Psychiatry and Behavioral Sciences
• Cardiovascular Health and Lipid Metabolism

Background:

• Existing research suggests a link between serum lipid profiles and suicidal behaviors.
• Understanding sex-specific associations between lipid levels and suicide is crucial for targeted interventions.

Purpose of the Study:

• To investigate the relationship between serum lipid levels and death by suicide in individuals who have attempted suicide.
• To examine these associations separately for males and females.

Main Methods:

• Retrospective cohort study of suicide attempters visiting emergency departments (2007-2011).
• Sex-stratified Cox proportional hazards regression and competing risk models were used.
• Kaplan-Meier survival analysis and cumulative incidence function (CIF) were employed for time-to-suicide comparisons.

Main Results:

• In female suicide attempters, lower serum total cholesterol (TC) levels (< 165 mg/dL) were associated with an increased risk of death by suicide.
• Hazard ratios (HR) for increased TC were 0.968 (Cox regression) and 0.970 (competing risk model) in women, indicating a protective effect of higher TC.
• No significant association was found for males in this study.

Conclusions:

• Lower serum TC levels may serve as a predictor of suicide in female suicide attempters.
• Enhanced monitoring and targeted interventions are recommended for women with low TC who have recently attempted suicide.